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— Unn Conti Michigan Herb 24:21 -23 PTERANDRA VIRIDIFLORA (MALPIGHIACEAE), NEW A FROM BRAZIL SPECIES Anderson Christiane Michigan Herbarium University of Ann 3600 Varsity Drive, Arbor, Michigan 48108-2287 Pterandra Adr. Juss. a genus of trees and shrubs of Central and South America is named (Fig. which for winged anthers (Fig. 2e). readily recognized by 1), is its It is its and The and stipules inflorescences. intra- epipetiolar stipules are entirely to partly connate, forming two broadly triangular structures that act as valvate bud scales. The inflorescences consist of 2-6-flowered fascicles borne in the axils of bracts or leaves that are crowded at branch apices. The peduncles are absent, and each pedicel subtended by and two The pubescent and a bract bracteoles. petals are abaxially is my monograph (Anderson persistent in fruit. In of Pterandra 1997), I recognized add 14 species; to these the novelty here described. I C. Anderson, nov. Type: Brazil. Minas Gerais: Berilo, sp. UHE-Irape, Tameirao Neto 3204 MICH!). E. (holotype: Fig. 2. cm cm Frutex. Laminae 6-8.5 longae, 2.5^1.1 latae, obovatae vel ellipticae, supra cm glabrae praeter costam dense sericeam, subtus tomentulosae; 0.4-1 petioli longi, mm 3-4 dense aureo-sericei; stipulae (2.5-) longae lataeque, connatae, adaxialiter hirsutae, abaxialiter aureo-sericeae. Inflorescentia ex fasciculis sessilibus et axil- cm laribus constans, floribus cujusque fasciculi 2-\\ pedicelli 2.1-2.7 longi, 0.5-0.6 mm diametro, dense aureo-sericei. Petala pallide viridia, limbo late elliptico vel late mm mm obovato vel suborbiculari; limbi petalorum lateralium 5-5.5 longi, 3-3.3 mm mm limbus 4 obovati, petali postici ca. 5.5 longus, ca. latus, suborbicularis. lati, mm mm Filamenta praeter caespitem basalem glabra. Styli ca. 4.5 longi. Cocci ca. 3.5 diametroque, hirsutulo-tomentosi. alti Shrub; young branchlets densely golden-sericeous, older ones glabrous. Laminas cm cm 6-8.5 long, 2.5-4.1 wide, obovate to apex obtuse-mucronate or some- elliptical, when young times emarginate, base cuneate, adaxially tomentulose but glabrate to glabrous at maturity except for the pubescent costa, abaxially sericeous or sparsely mm on composed medi- so but densely so the costa, the vesture of hairs 0.2-0.7 long, more or appressed, mostly white or sometimes golden, and fixed, terete, straight, less mm with scattered longer and thicker hairs, ca. 0.8-1.2 long, subsessile or with a stalk mm up to 0.05 long, translucent dots present on abaxial surface, costa and second- prominent ary veins abaxially, tertiary veins usually slightly raised as well; petioles mm cm 3-4 and 0.4-1 long, densely golden-sericeous; stipules (2.5-) long wide, connate, adaxially hirsute, abaxially sericeous. Inflorescence of sessile, 2^1-flowered cm fascicles, each fascicle borne in the axil of a leaf; pedicels 2.1-2.7 long, 0.5-0.6 mm mm mm in diameter, densely golden-sericeous; bracts 2-2.2 long, 0.8-1 wide, volume hiriiarium .rNivi-.usrrYni-MiriiuiAN 2 triangul hra< ng, ca. nd adcoles ir. ,, I' i , I i . , mm apex with the acute, abaxia] n-sericeous. Sepals ca. 2.5 long, ca. i mm mm 2 wide, triangular (the distal 2/3 ligulate), recurved, glands ca. 2 long, ca. 0.8 mm wide. Petals light green, margin erose. abaxially densely pubescent on claw and mm mm mm center of limb; lateral petals: claw 1.5-1.7 long, limb 5-5.5 long. 3-3.3 mm mm o o claw limb petal: ca long, ca. 5.5 long, ca. il i. I i i I I » t j mm 4 wide, the limb suborbicular. Filaments glabrous except basal of for a tuft hairs, mm those of stamens opposing sepals ca. 2.5 long, those of stamens opposing petals mm mm mm ca. 3 long; anthers ca. long, wing of outer locules 0.2 wide. Styles ca. 1 mm mm 4.5 long, ca. 0.3 in diameter, with scattered hairs adaxially in the proximal mm mm 1/4. Cocci ca. 3.5 high and in diameter, hirsutulose-tomentulose; torus ca. 1 igh a mi' seed not seen. ii i. known Ptcrandra viridifiora only from the type. distinctive in green pet- is It is its als and the placeim mllorescenci In mosl specie fascicles are borne lie i < • I I • 1 - 1 on a leafless node of a short shoot, often below a Hush of new leaves, and subtended by a bract compos, d of lh> mules and a rudimentary leaf; in flavescens and P. P. i new sericea (occasional aie placed in the axil of a leaf. In P. viridifiora I. i the fascicles are borne in the axils of well-developed leaves of a young shoot. Because most species ol 'Ptcrandra are known from le colli ions, their ranges An known common showy are not well (Fig. exception the pyroidea, which ). is P. is 1 lluu MinasGerais, in the Distrito Federal, an similar hatsch- hi y P. bachii was found to the west Mato Grosso. Both species are low shrublets and have in large pink petals rand, -a vir'uiitiora oi col led ei in <i n mas Gerais, but in ' I aspects resembles more the northern species, wh hrubs to trees and all lai - i ill m FIG. Pterandni 2. Dclaii slunvii iseilioi n Mi i > f;i I I \ I m. in i- nole die heart shaped inlr; ml epincliolar stipuli Ueral petal, abaxial vie\v d 'i I" ( m Posterior petal Hag"), abaxial view tamen del laxia ind ide views. n ( I i I mm; mm; mm; mm. c, d, 4 e, 2 2.7 (Based on Tameirao Nero 3204.) f, have cream Green smaller petals, white to (yellow in age). petals are otherwise un- known in the genus, although -Niiown only from the type, was reported • . on have The the label to greenish white petals. label data for P. viridiflora did not on include notes stature, only that shrub. it is ACKNOWLEDGMENTS William R.Andersc of Pterandra viridiflora. LITERATURE CITED f/V/Y//?f/ra(MalpiL',hiac( le) onti Univ. Michigan Herb. 21: 1-27. >